What "serious chance of permanent damage to the birther"? Down-thread, you make it clear that you're not talking about something that a C-section can prevent. What are you talking about?
We are aware that birthing causes a permanent change to the body in terms of bone calcium, along with things like tearing(which is really common), hormonal changes, etc. I also should note I consider C-sections to be serious damage, as it results in the cutting of the abdominal muscles and uterus, which can result in weakness later on.